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Finding the Third Proportional to 311,919 and 472,283

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Solution

The third proportional to 311,919 and 472,283 is: 715,093.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,919 : 472,283 = 472,283 : x
  2. Step 2: Convert to fraction form
    311,919/472,283 = 472,283/x
  3. Step 3: Cross multiply
    311,919x = 472,283 × 472,283
  4. Step 4: Simplify right side
    311,919x = 223,051,232,089
  5. Step 5: Solve for x
    x = 223,051,232,089/311,919
  6. Step 6: Final answer
    x = 715,093.44

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.